diff --git a/package.json b/package.json
index e947ab418ff4..af4076b2dece 100644
--- a/package.json
+++ b/package.json
@@ -157,7 +157,7 @@
   "bundlesize": [
     {
       "path": "./lighthouse-extension/dist/scripts/lighthouse-background.js",
-      "threshold": "510 Kb"
+      "threshold": "520 Kb"
     },
     {
       "path": "./lighthouse-viewer/dist/src/viewer.js",